NavMesh fails with SkeletalMeshActors

I try to use a NavMesh on a level with SkeletalMeshActors and results are not as expected.

SkeletalMeshes are very simple, just like a cabinet with a door. They have a physical asset defined and they aren’t simulating physics. It looks like the NavMesh considers the actor to be rotated of 90° around y; as you can see here if I rotate the actors of 90°, their navmesh area appears like it should be when they aren’t rotated.

I’ve posted the question also on the answerhub: NavMesh fails with SkeletalMeshActors - Character & Animation - Unreal Engine Forums

Thank you in advance for help.